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Cheap flights from London Gatwick Airport to Washington, D.C. from $538

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Gatwick Airport to Washington, D.C. (LGW-IAD)

Cheap round-trip flights

Logo
2:00 pm - 6:24 pmLGW-IAD
33h 24m1 stop
Logo
10:30 pm - 3:45 pmIAD-LGW
12h 15m1 stop
$587
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Wed, Sep 3 - Sun, Nov 2
Logo
2:00 pm - 6:24 pmLGW-IAD
33h 24m1 stop
Logo
5:30 pm - 9:50 amIAD-LGW
11h 20m1 stop
$588
Find Deal
Wed, Sep 3 - Mon, Nov 3
Logo
8:55 am - 7:20 pmLGW-IAD
15h 25m2 stops
Logo
11:15 pm - 8:55 pmIAD-LGW
16h 40m2 stops
$591
Find Deal
Fri, Sep 26 - Sun, Sep 28
TAP AIR PORTUGAL Logo
4:25 pm - 8:50 pmLGW-IAD
33h 25m1 stop
TAP AIR PORTUGAL Logo
10:20 pm - 9:45 amIAD-LGW
30h 25m1 stop
$592TAP AIR PORTUGAL
Find Deal
Wed, Oct 1 - Sun, Oct 5
Icelandair Logo
3:40 pm - 10:10 pmLGW-IAD
11h 30m1 stop
Icelandair Logo
8:30 pm - 2:35 pmIAD-LGW
13h 05m1 stop
$593Icelandair
Find Deal
Wed, Oct 8 - Mon, Oct 13
Logo
2:00 pm - 6:24 pmLGW-IAD
33h 24m1 stop
Logo
6:10 am - 6:20 amIAD-LGW
19h 10m2 stops
$594
Find Deal
Wed, Sep 10 - Sun, Sep 21
Logo
8:45 pm - 7:30 pmLGW-IAD
27h 45m2 stops
Logo
9:00 pm - 8:15 pmIAD-LGW
18h 15m1 stop
$595
Find Deal
Tue, Sep 23 - Tue, Sep 30
Icelandair Logo
3:40 pm - 7:20 pmLGW-IAD
32h 40m1 stop
Icelandair Logo
8:30 pm - 2:40 pmIAD-LGW
13h 10m1 stop
$596Icelandair
Find Deal
Mon, Sep 15 - Wed, Oct 1
SWISS Logo
6:40 pm - 4:15 pmLGW-IAD
26h 35m1 stop
SWISS Logo
8:45 pm - 5:50 pmIAD-LGW
16h 05m1 stop
$630SWISS
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Thu, Oct 2 - Thu, Oct 9
SWISS Logo
6:40 pm - 4:15 pmLGW-IAD
26h 35m1 stop
SWISS Logo
8:45 pm - 5:50 pmIAD-LGW
16h 05m1 stop
$637SWISS
Find Deal
Thu, Oct 2 - Thu, Oct 9

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Oct 1
LGW4:25 pmLondon Gatwick
33h 25m
1 stop
IAD8:50 pmWashington, D.C. Dulles Intl
Oct 5
IAD10:20 pmWashington, D.C. Dulles Intl
30h 25m
1 stop
LGW9:45 amLondon Gatwick
$592
Find similar
TAP AIR PORTUGAL
Aug 28
LGW10:35 amLondon Gatwick
15h 15m
1 stop
IAD8:50 pmWashington, D.C. Dulles Intl
Sep 7
IAD10:20 pmWashington, D.C. Dulles Intl
17h 05m
2 stops
LGW8:25 pmLondon Gatwick
$721
Find similar

SWISS flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
Oct 2
LGW6:40 pmLondon Gatwick
26h 35m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Oct 9
IAD8:45 pmWashington, D.C. Dulles Intl
16h 05m
1 stop
LGW5:50 pmLondon Gatwick
$630
Find similar
SWISS
Oct 2
LGW6:40 pmLondon Gatwick
26h 35m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Oct 9
IAD8:45 pmWashington, D.C. Dulles Intl
16h 05m
1 stop
LGW5:50 pmLondon Gatwick
$637
Find similar
SWISS
Oct 2
LGW6:40 pmLondon Gatwick
26h 35m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Oct 9
IAD8:45 pmWashington, D.C. Dulles Intl
16h 05m
1 stop
LGW5:50 pmLondon Gatwick
$644
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 9/3

2:00 pm-6:24 pm

1 stop33h 24m

Washington, D.C. Dulles Intl

Sun 11/2

10:30 pm-3:45 pm

1 stop12h 15m

$587

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 9/3

2:00 pm-6:24 pm

1 stop33h 24m

Washington, D.C. Dulles Intl

Mon 11/3

5:30 pm-9:50 am

1 stop11h 20m

$588

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 9/26

8:55 am-7:20 pm

2 stops15h 25m

Washington, D.C. Dulles Intl

Sun 9/28

11:15 pm-8:55 pm

2 stops16h 40m

$591

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 10/1

4:25 pm-8:50 pm

1 stop33h 25m

Washington, D.C. Dulles Intl

Sun 10/5

10:20 pm-9:45 am

1 stop30h 25m

$592

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 10/8

3:40 pm-10:10 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

Mon 10/13

8:30 pm-2:35 pm

1 stop13h 05m

$593

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 9/10

2:00 pm-6:24 pm

1 stop33h 24m

Washington, D.C. Dulles Intl

Sun 9/21

6:10 am-6:20 am

2 stops19h 10m

$594

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 9/23

8:45 pm-7:30 pm

2 stops27h 45m

Washington, D.C. Dulles Intl

Tue 9/30

9:00 pm-8:15 pm

1 stop18h 15m

$595

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Mon 9/15

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

Wed 10/1

8:30 pm-2:40 pm

1 stop13h 10m

$596

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 10/2

6:40 pm-4:15 pm

1 stop26h 35m

Washington, D.C. Dulles Intl

Thu 10/9

8:45 pm-5:50 pm

1 stop16h 05m

$630

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 10/2

6:40 pm-4:15 pm

1 stop26h 35m

Washington, D.C. Dulles Intl

Thu 10/9

8:45 pm-5:50 pm

1 stop16h 05m

$637

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, February is the cheapest month to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $561. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $573.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $818. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $950.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $877 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $729 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport for as low as $503 on momondo.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Direct flights

None
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
Arlington
National Harbor
Winchester
Woodbridge
Waldorf
Tysons
Silver Spring
Laurel
Colonial Beach
Fredericksburg
Harpers Ferry
Manassas
Towson
Rockville
Gaithersburg
Reston
Fairfax
Glen Burnie

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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